Terry McKenna is the surviving son of an American millionaire who gouged his fortune out of the Bolivian silver mines via the impoverished campesino Indians. Now a missionary priest, Terry returns to the mountain plain of his childhood in an attempt to redeem his family name and to save the custom-ridden Indians from themselves. When he distributes birth control pills to the peasants' wives, the local Bishop opposes him while the enraged campesino males, drunk on machismo and chicha beer, unsuccessfully attempt to render him permanently celibate. And he has his own conflict with his priestly vows when he falls in love with a young social worker. Tension mounts on the high plain as revolutionary terrorists goad restless Indians to an armed rebellion against the landed Spanish gentry, the church, the police and even the secret police. One can easily guess who, by formula, must fall martyr to vicissitude but this is still one of Jon Cleary's efficient action entertainments.